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	<head>
		<meta charset="UTF-8">
		<title>这是标题。。。</title>
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			table tr td{
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		<label>中深软通</label>
		<!--<table border="1" cellspacing="20" cellpadding="5">
			<tr>
				<th>序号</th>
				<th>姓名</th>
			</tr>
			<tr>
				<td>1</td>
				<td>张泽某</td>
			</tr>
			<tr>
				<td>2</td>
				<td>吴荣来</td>
			</tr>
			<tr>
				<td>3</td>
				<td>刘浩</td>
			</tr>
		</table>-->
		
		<a href="mailto:516758897@qq.com">发邮件</a>

		<h2 align="center">居中显示</h2>
		<hr />
		<p>p标签</p>
		<hr />
		<!--Ctrl+R：运行-->
		<pre>
			<b>预定样式</b>
			<b>编号</b>	名称	价格
			001  	教材	22.0
		</pre>
		X<sup>2</sup><br />
		log<sub>2</sub>N
		<hr width="50%" color="red" align="center" size="10" />
		<img src="../img/songshu.png" alt="这是一只小松鼠"/>
		<br />
		
		<!--alt:表示当资源找不到时，打印的语句-->
		<img src="../img/songshu0.png" alt="这是一只小松鼠"/>
	
	
	
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		function add(x,y){
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		console.log(add(3,5));
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